.caja {
    align-content: center;
    text-align: center;
    align-items: center;
    color: rgb(57, 59, 148);
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}

.caja video {
    width: 600px;
    height: 500px;
}